# Author:Wujia
# Date:week07

phrase = "Don't panic"
plist = list(phrase)  # list() 可以将 str to（转换） list
# print(phrase)
# print(plist)

on_str = ''.join(plist[1:3])
print(on_str)
new_phrase = on_str+ ''.join(plist[5]+plist[4]+plist[7]+plist[6])
print(plist)
print(new_phrase)